Dynamo-electric machine.



B. A. BEHREND.

DYNAMO ELECTRIC MACHNE. APFUCAHGN {IL ED MN5 2S 1,135,656, 27mm-m m.. w15,

Bernard Aehrend :Nr/NTM A 2705A??? Ke WTNESSES.-

B. A. BEHREND.

DYNAMG ELECTRIC MACHINE.

APrucATloN mio June 25. 1906.

1,135,656. Patented Apr. 13, 1915 2 SHEETSBHEET 2.

Bernard A. Behrend JNVENTQR UNITED STATES PATENT OFFICE.

BERNARD A. BEHREND, F NORWOOD, OHIO, ASSIGNOR. BY MESNE ASSIGNMENTS, TO ALLIS-CHALMERS MANUFACTURING COMPANY, A CORPORATION 0F DELAWARE.

DYNAMIC-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented Apr. 13, 1915.

Application filed June 25, 1904:?A Sierial No. 323,224.

Be 'it known that l, Barisano A. BEHREND, citizen of the United State-s. residing at Norwood. in the county of Hamilton and State ci' Uhio, have invented certain new and useful Improvements in l')ynamoelfllectric Machilies, of which the following is a full, clear, and exact specification.

My invention relates to dynamo-electric machines and particularly to high speed turbo-alternators.

One of the objects of my invention is t0 provide an improved housing or casing for completely inclosing a dynamo-electric machine, which housing is so constructed that air can be drawn from a point outside of the building in which the machine is located, by fans or blowers on the ends of the rotary member or rotor, into the housing, preferably at the bottom thereof, and then forced through. the circumferential passagcways of the stationary member or stator.

A further object is to provide an improved means for supporting the conductors lead ingfrom the winding of the rotary member to the collector rings.

My invention-consists in thc details of constructiomand in the combinations and arrangements of parts described in thc specification and set forth in the appended claims.

For aA better understanding of my invention, reference is had to the accompanying drawings forming a part of this application in which* Figure 1 is a partial vertical sectional elevation of a dynamo-electric machine equipped with my invention; Fig. 2 is an end elevation, with parts broken away, on a slightly reduced scale; and F ig. 3 is a moditication of the supporting and retaining means for the collector leads.

Referring now to the figures of the drawings, I have shown at the rotary memberor rotor, and at 11, the stationary member or" stator of a turbogcnerator, both of which are lnclosed by a ACasing or housing l2. The

rotor, which in this case the tcld member,

includes the core 13, and coil retainin and protecting end rings 1t, thc core eing mounted ou a shat't l5 passing through suitable openings in the housing. The rorc of the stator ll, which inl this case is an armature, consists of lamincc which are damped housing supports the armature core, which 65 may be dove-tailed to the housing or secured thereto in any suitable manner, and is provided with supporting feet or pedestals 21 adapted to rest on a base or foundation. The lower part ot' theI housing is provided with an enlarged portion :22, forming an air chamber 23 which communicates with the air passagcways li' of the armature core. The housing is provided at the top with a chimney 2i, through which the air after 7 passing through the circumferential passageways 17 can escape from the machine. The end portions of thc housing are cach provided with a circular flanged opening through which the shaft extends, the fiange fitting closely around a stuffing ring Q6 secured to the shaft, the purpose ot' which will be explained more fully. Each end portion is also provided with a chamber 27 for the admission of air, which chamber is open at the bottom and around the shaft. The cham ber is formed by an inwardly extending Hange 28 on the inner surface of the housing, which- Harige extends around the upper portion of the shaft. at a suitable distance therefrom, on an are of a circle concentric therewith, and extends vertically downward, on eachside of the shaft. Below the shaft the vertical parallel portions of the fiange are covered with an inner wall or partition 29 which extends from the bottom upward toward the shaft, the upper edge being curved on an arc of the same radius as the upper portionof the Han e.

Secured to the inner e ge of the fiange 28 and partition 29. around the opening 1s an adjustable plate 30, in this case, a ring, extending inwardly toward the shaft, which ring limits the size of the air opening around the shaft.. Thc ring is secured to the housing by bolts 30W is shown the bolt holes in the ring slightiytlarger than the bolts so that the position of the ring can be adjusted. Secured to each end of the rotor is a fan or blower comprising fan-blades 31 and a plate 32 coveringvthe. blades and having at its inner edge a shroud- 5 ring 33 fitting closely within the ring 30. The removable rings 30 provide means for adjusting the size of the openings around the shaft for blowers of different sizes. In case larger openings are desired the rings can be removed and the openings machined to a larger' size. If the openings are too small, other rings having larger openings can be easily substituted. In case there are slight inaccuracies of workmanship or thel parts are not accurately assembled, the rings i3() can be adjusted to properly tit the fanblades.

At 34 are shown collector leads or conductors connecting the field winding to the collector rings 35 on the shaft outside of the housing. 'l`he blades are retained in position and prevented from being displaced at high speeds b v cleats 36 and by the stutiing rings 2G through one of which each lead extends. As was stated before, the end walls of the housing tit closely around the rings 26, so as to leave only a very small clearance. Thus the combined conductor retaining` rings and stuffing rings dispense with the necessity of large openlngs between the shaft and the housing which Would otherwise be necessary if the leads were secured to the shaft by cleats only. The collector rings 35 are in this case seated on sleeves sleeves may be secured to the shaft in any suitable manner. The rings are each provided With an undercut portion forming a shoulder 37 which extends over the clamping nut 38 and separating insulation 39, so as to protect the latter and prevent its being displaced at high speeds.

In Fig. 3 I have shown a. slight modification of my conductor retaining means. The collector lead or conductor is retained in position by the clamping nut 40 and by a stuffing ring 41 of considerable length in the shape of a sleeve or collar which is provided With ay slot 42 in its inner surface through which the lead or conductor passes. With this type of retaining means, practically the entire length of the lead is rotected against the action of centrifugal orce. As in the previous ease the flanged inner surface of the shaft opening of the housing lits closely around the sleeve 41.

lVhen the rotor is in operation, a large volume of air is drawn by the fans into the chambers Q7 which may be connected to suitable air conducting tubes or pipes, and passes into the housing through the annular openings between the rings and the. shaft. The air then passes into the large receiving chamber Q3 at the bottom of the housing, from which the air passes upward in pareach having an inclined surface, which allel paths through the stator on both sides of the rotor and out through the chimney 24.

B v means of the rings or sleeves ZG or 41 the collector leads are securely retained in position and pass to the collector rings on the outside of the housing without necessitating a large opening around the shaft and without in the least weakening the shaft, as is the rase when the leads are passed through slots or openings in the shaft. Thus the rings or sleeves not only serve to retain the collector leads in position but also serve as stuffing rings around the shaft to prevent the hot, or oil laden air in the immediate vicinity of the generator from being drawn into the housing through the shaft openings. ly prmiding the collector rings with the undercut portions in which the adjusting nut and separating insulation are located, the insulation is protected from being displaced by centrifugal force, the collector has a better appearance and considerable space in an axial direction is saved. I have in this case shown the collector` rings at both ends of the machine but if desired both rings may be mounted on the shaft at one end et the machine.

I do not wish to be confined to the details of construction here shown, but aim in my claims to cover all modifications which do not involve a departure from the spirit and scope of my invention.

W'hat I claim as new and desire to secure by Letters Patent is 1. In a dynamo-electric machine, a. stator, a rotor having fans or blowers at the ends thereof, a housing or casing surrounding the stator and rotor and having end walls enitending toward the shaft, said housing having air inlet openings around the rotor shaft and an air outlet opening at theA top,

and removable members within the housin each having a circular opening, adjustably secured to the end Walls of the housing over the air inlet openings, and fitting closely around the fan-blades.

2. In aV dynamo-electric l1iachine.astator, a. rotor having a fan or blower fecured to each end thereof, a housing or casing surrounding the stator and rotor and open at the top `'for the escape of air, said housing .having en'd walls extending toward the shaft and providing air inlet openings around the rotor shaft, and a removable member having a circular opening concen# tric with the shaft, secured in position over each inlet opening and fitting closely around the fan or blower.

3. In a dynamo-electric machine, a stator, a rotor having a fan or blower at each end thereof, a housing inclosing the stator and rotor and having an air inlet chamber at each end thereof and an air outlet opening at the top, each chamber having an open# ing around the rotor shaft; and e removable plate having a circular opening and secured to the wall o the chamber around the shaft adjacent the nn.

4. In a dynamo-electric machine, a stator, e rotor having a fan or blower :1t each end thereof, a housing inelosing the stator :ind rotor, ysind having,r an air inlet elmnilier at euch end and an air outlet opening at the Ato'p,enel1 chamber havingunopening n round the rotor shaft, und u reniomhle pluie eo\ering the opening. Seid plut(- extemling inward toward the shaft und having; :i eireulnr opening adjar'ent the 'fun or hlmver.

.3. lr. u d vnuuioeleetril z niuehine,u stator, u ri tor inning! u i'un or lilower ut its end, u hou.iin;r or easing for the machine, :1nd an nir uilinimion eliunilier on the inner Side of un enfl of the housing; romprising' u flange extending: inward axially from the end of 20 `the housing toward the fan, over the shaft,

and dowmvard on each side thereof, and a. wall or pertition between the axlally inner edges o 6. In a dynamoelectrie muchine,a stator, n. rotor having: n fan or blower at nn end thereof, n housingr inclosing the stator and rotor and huring un air inlet chamber at the end thereof adjacent Suid fan and an air outlet. opening ut the top, said inlet chainlier having un opening` around the rotor shaft, und n reino\"nble plate having a eentral openingr `ind secured to the wall of said elmnilier around the shaft afljAcent said fan. Inv tetiinony whereof I aflix my signature,

in the presence of two witnesses.

BERNARD A. BEHRENI).

W'itnesses:

l'linuue'r SU'rPHIN,

L /nrim E. WELCH.

the lower portions of the flange, -below the shaft. 

